I don't know if this will work or not
you could use my save file
I'm only finishing the tutorial mission, then roaming to Stenmyra and Hagaboda to hunt harvester & tanks using these table, and could find:
- Special 50 cal with Special extended Magazine, 16x Scope, and IR Vision attached, complete with armor-piercing ammo 999
- Special Semi-Auto Shotgun,
- Special Klauke 17
- Special Moller PP
- Exceptional 12 G pump action, with Silencer and Good 1-4x Scope
- Exceptional Algstudsare Hunting Rifle, with Exceptional 4-8x Scope, and Special Silencer
- Exceptional AI-76, With Exceptional Extended Magazine, Worn ACOG and trash Silencer
- and some Worn and Trash level weapon
I'm not touching any mission along the way, so basically, you got fresh start file with the best weapon available
btw I have to finish the tutorial mission to unlock some loot. if you just start the game and try to force farming without touching the tutorial mission, some of your loot boxes will be empty, and u cant find Special grade fast.

I'm using Codex with the latest update "bike" version of the game
you could copy the folder into your C:\Users\XXXXXX\Documents\Avalanche Studios\GenerationZero\Saves
don't forget to backup your save folder first, just in case.

EDIT: I can confirm this is work, by using 2 other PC, remember CODEX Only
and i find some bug in this save file , like beacon is not spawn , then you couldn't finish the beacon mission, i'll try to fix this. btw only 2 beacon is missing